@Destinyheroknight: "Final Clash" could mean a lot of different things and I almost guarantee some users would use it incorrectly. It kind of sounds like "Final Battle" which isn't what it means in this case at all.

Plus, what about the times when a beam struggle isn't the finale to a fight? It could happen mid-fight, in which case it wouldn't be "final" at all.

These are the sorts of reasons why I usually use the established trope names from TV Tropes. They're more specific so confusion like this can be avoided.